نتایج جستجو برای: asymmetrical windings
تعداد نتایج: 10317 فیلتر نتایج به سال:
The surge in electric vehicles (EVs) and their electrical appliances requires highly efficient, lightweight machines with better performance. However, conventional wire used for machine windings have certain limits to the current requirements. Copper is a commonly material windings, due its ohmic resistance, it causes 75% of total losses (copper losses). high mass copper results bulky system si...
Acute exacerbation (AE) of idiopathic pulmonary fibrosis (IPF) results in poor survival. The objective of the present study was to elucidate the impact of asymmetrical ground-glass opacity (GGO) and/or consolidation on outcomes in patients with AE-IPF. The cases of 59 consecutive patients with AE-IPF were retrospectively reviewed. High-resolution computed tomography (HRCT) at diagnosis of an AE...
Cochlear implantation in children with an asymmetrical hearing loss is now becoming more recognized as an appropriate and beneficial treatment option. In our programme, we have been implanting children with asymmetrical hearing loss since 2008. Asymmetrical hearing loss is defined as hearing loss when one ear meets criteria for cochlear implantation and the other ear has better hearing and rece...
Introduction: Traditional gradient coil design is typically constrained to cylindrical, planar, spherical or conical surfaces. Gradient coil geometry is important in arriving at optimal trade-offs between gradient homogeneity, coil efficiency and inductance [1]. Additional concerns such as the induction of eddy currents and peripheral nerve stimulation, patient claustrophobia and acoustic noise...
Mutual inductance is a phenomenon caused by the circulation of the magnetic flux in the core of an electrical machine. It is the result of the effect of the current flowing in one phase on the other phases. In conventional three-phase machines, such an effect has no influence on the electrical behaviour of the device. Although these machines are powered by power inverters, no problem should occ...
Partial discharges (PD) are recognized as the main cause of the inner insulation deterioration process in power transformers. Therefore, the optimum inner insulation design is one of the challenges a transformer designer is faced with. Transformer strength, especially during transient conditions, is a criterion for transformer insulation designers. This challenge has made designers initiate and...
A mathematical model of a two-winding transformer for research fast transient processes in windings the form an electromagnetic circuit, taking into account main magnetic flux, own and mutual interturns interwinding dissipation fluxes, transverse turns longitudinal capacitances winding, is developed by using straights method. The created simplifies engineering calculations applying methods theo...
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